Boeing today is trading at $141.58 it went down with $7.19 from $148.77.
This is mainly because Boeing is making a new 737 max software update to address computer problems that caused two fatal crashes five months ago so that it gets regulatory approval to resume flights. The software update is going to focus on the flight control microprocessor and the autopilot feature. Boeing noted that the new software is not tied to MCAS which is an anti-software that faulted both fatal crashes.
However, Boeing did not say when it expects the updates to be completed and this made the share go down.